SGS Thomson Microelectronics 74LCX16245TTR Datasheet
LOW VOLTAGE CMOS 16-BIT BUS TRANSCEIVER
WITH 5V TOLERANT INPUTS AND OUTPUT (3-STATE)
■ 5V TOLERANT INPUTS AND OUTPUTS
■ HIGH SPEED:
t
= 4.5 ns (MAX.) at VCC=3V
PD
■ POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
|=IOL= 24mA (MIN) at VCC=3V
OH
■ PCI BUS LEVELS GUARANTEED AT 24 mA
■ BALANCED PROPAGATION DELAYS:
t
≅ t
PLH
PHL
■ OPERATING VOLTAGE RANGE:
V
(OPR) = 2.0V to 3.6V (1.5V Data
CC
Retention)
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 16245
■ LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
■ ESD PERFORMANCE:
HBM > 2 000V (MIL STD 883 method 3015);
MM > 200V
74LCX16245
TSSOP
ORDER CODES
PACKAGE TUBE T & R
TSSOP 74LCX16245TTR
PIN CONNECTION
DESCRIPTION
The 74LCX16245 is a low voltage CMOS 16 BIT
BUS T RA NS CEIVER (3-STATE) fabricated with
sub-micron silicon gat e and double-layer metal
wiring C
2
MOS technology. It is ideal for low power
and high speed 3.3V applications; it can be
interfaced to 5Vsignalenvironmentfor both inputs
and outputs.
This IC is intended for two-way asynchronous
communication between data buses; the direc tion
of data transm ission is determined by DIR input.
The t wo enable inputs nG
canbeusedtodisable
the device so that the buses are ef fectively isolated.
It has same speed performance at 3. 3V than 5V
AC/ACT family, combined withalower power consumption.
All inputs and outputs are equipped with protection circuits against static discharge, giving them
2KV ESD immunity and tr ans ient excess voltage.
All floating bus terminals during High Z State must
be held HIGH or LOW.
1/10July 2003
74LCX16245
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No SYMBOL NAME AND FUNCTION
1 1DIR Directional Control
2, 3, 5, 6, 8, 9,
11, 12
13,14,16,17,
19, 20, 22, 23
24 2DIR Directional Control
25 2G
36,35,33,32,
30, 29, 27, 26
47,46,44,43,
41, 40, 38, 38
48 1G
4, 10, 15, 21,
28, 34, 39, 45
7, 18, 31, 42
1B1 to 1B8 Data Inputs/Outputs
2B1 to 2B8 Data Inputs/Outputs
Output Enable Input
2A1 to 2A8 Data Inputs/Outputs
1A1 to 1A8 Data Inputs/Outputs
Output Enable Input
GND Ground (0V)
V
CC
Positive Supply Voltage
TRUTH TABLE
INPUTS FUNCTION OUTPUT
G
L L OUTPUT INPUT A = B
L H INPUT OUTPUT B = A
HXZZZ
X :Don‘t Care
Z : High Impedance
DIR A BUS B BUS Yn
IEC L OGIC SYMBOLS
2/10
74LCX16245
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
V
I
I
OK
I
I
CC
I
GND
T
T
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
1) I
absolute maximum rating must be observed
O
2) VO<GND
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Value Unit
V
V
V
V
I
OH,IOL
I
OH,IOL
T
dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V
1) Truth Table guaranteed: 1.5V to 3.6V
from0.8V to2Vat VCC=3.0V
2) V
IN
Supply Voltage
CC
DC Input Voltage (DIR, G)
I
Bus I/O Voltage (OFF State)
I/O
Bus I/O Voltage (High or Low State) (note 1) -0.5 to VCC+ 0.5
I/O
DC Input Diode Current
IK
DC Output Diode Current (note 2)
DC Output Current
O
DC Supply Current per Supply Pin
DC Ground Current per Supply Pin
Storage Temperature
stg
Lead Temperature (10 sec)
L
Supply Voltage (note 1)
CC
Input Voltage
I
Output Voltage (OFF State)
O
Output Voltage (High or Low State) 0 to V
O
High or Low Level Output Current (VCC= 3.0 to 3.6V)
High or Low Level Output Current (VCC= 2.7V)
Operating Temperature
op
-0.5 to +7.0 V
-0.5 to +7.0 V
-0.5 to +7.0 V
-50 mA
-50 mA
± 50 mA
± 100 mA
± 100 mA
-65 to +150 °C
300 °C
2.0 to 3.6 V
0 to 5.5 V
0 to 5.5 V
CC
± 24 mA
± 12 mA
-55 to 125 °C
V
V
3/10
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